On Thursday, Usha, Zara, Mary and Sarah spent a total of $127. On Friday, Usha spent twice of what she spent on Thursday, Zara spent the same as what she spent on Thursday, Mary spent $11 less than what she spent on Thursday, and Sarah spent $3 more than what she spent on Thursday. All of them spent an equal amount on Friday. How much did Usha and Sarah spend altogether on Thursday?
|
Usha |
Zara |
Mary |
Sarah |
Total |
Before |
1 u |
2 u |
2 u + $11 |
2 u - $3 |
$127 |
Change |
x 2 |
|
- $11 |
+ $3 |
|
After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Thursday
= 1 u + 2 u + 2 u + 11 + 2 u - 3
= 7 u + 11 - 3
= 7 u + 8
7 u + 8 = 127
7 u = 127 - 8
7 u = 119
1 u = 119 ÷ 7 = 17
Total amount that Usha and Sarah spent on Thursday
= 1 u + 2 u - 3
= 3 u - 3
= 3 x 17 - 3
= 51 - 3
= $48
Answer(s): $48